WO2005114434A1 - Reseau de vehicule a bus d'acces partage interrompu - Google Patents

Reseau de vehicule a bus d'acces partage interrompu Download PDF

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Publication number
WO2005114434A1
WO2005114434A1 PCT/US2005/013438 US2005013438W WO2005114434A1 WO 2005114434 A1 WO2005114434 A1 WO 2005114434A1 US 2005013438 W US2005013438 W US 2005013438W WO 2005114434 A1 WO2005114434 A1 WO 2005114434A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch fabric
shared
access bus
vehicle
feature
Prior art date
Application number
PCT/US2005/013438
Other languages
English (en)
Inventor
Walton L. Fehr
Hugh Johnson
Patrick D. Jordan
Hai Dong
Original Assignee
Motorola, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO2005114434A1 publication Critical patent/WO2005114434A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40234—Local Interconnect Network LIN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40241—Flexray
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

Definitions

  • the present patent relates to vehicles and particularly to communication networks within vehicles.
  • Background Vehicle builders have been using serial communication (multiplexing) between controllers to share information and distribute control for some time. Doing so has greatly reduced the amount of vehicle signal wiring needed to implement the comfort, convenience, and safety features desired in modern consumer vehicles.
  • Control of the devices in the vehicle to implement desired features may be divided into controllers by function (powertrain, braking, steering, etc.), by location (engine compartment, seat, door, etc.) or in combinations thereof.
  • the controller for each of the functions/zones may share information with other controllers using a shared-access serial bus.
  • the bus usually follows an industry standard such as J1850, CAN, LIN, Flexray, MOST and the like, well known to those of skill in the art. Multiple, independent busses may be used. In that case, one of the controllers may act as a gateway for information between the incompatible busses.
  • An alternative architecture introduces the idea of dividing the vehicle into geographic regions and locating a single controller for all of the features in that region. This architecture may also include the concept of smart peripherals to reduce the number of interconnections in localized areas of the vehicle.
  • the smart peripherals use simple serial communication busses such as LIN busses to relay information from sensors to the zone controller or to accept actuator commands from the zone controller.
  • the zone controllers may be linked by a serial communication bus structure.
  • junction block that can be located in various zones of the vehicle.
  • the junction block provides a mechanical and electrical connection point for power, ground and communication for small devices that are used to interface between input and output devices.
  • the junction block also provides over current protection devices for the small connected devices, and multiple power sources distributed at different levels within the system.
  • Current bus protocols are not easily scalable and are limited in bandwidth. X-by-wire functionality, multimedia infotainment, navigation and other content intensive applications will put more demands on bandwidth and quality of service (QoS) requiring marked improvements in bandwidth, speed, delay, jitter, fault tolerance, message integrity, guaranteed delivery, availability and survivability.
  • QoS quality of service
  • FIG. 1 is a schematic representation of a vehicle incorporating a vehicle network.
  • FIG. 2 is a schematic block diagram representation of vehicle network including an interrupted shared access bus.
  • FIG. 3 is a schematic block diagram further illustrating the vehicle network depicted in FIG. 2.
  • FIG. 1 illustrates a vehicle 100 including a network 102 to which various vehicle devices 104-110 are coupled.
  • the devices may be sensors, actuators, processors and the like used in connection with various vehicle functional systems and sub-systems, such as, but not limited to, control-by- wire applications for throttle, braking, steering and suspension control, power accessories, communications, entertainment, and the like.
  • the vehicle devices 104-110 may be coupled by interfaces 112-118, which may be any suitable interface for coupling the particular device to the network 102, and may be wire, optical, wireless or combinations thereof. It should be understood, however, that the interfaces are not required elements and that the devices 104-110 may be directly coupled to the network or may form portions of the network.
  • the vehicle devices 104-110 may be adapted to provide one or more functions associated with the vehicle 100. These devices may be data producing, such as a sensor, data consuming, such as an actuator, processing or other devices, which both produce and consume data, or routing that transport data within the network.
  • an actuator typically a data-consuming device, may also produce data, for example where the actuator produces data indicating it has achieved the instructed state, or a sensor may consume data, for example, where it is provided instructions for the manner of function.
  • Data produced by or provided to a device, and carried by the network 102, is independent of the function of the device itself. That is, the interfaces 112-118 may provide device independent data exchange between the coupled device and the network 102.
  • the network 102 includes a switch fabric 130 defining a plurality of communication paths 132 between the devices. The communication paths permit multiple simultaneous peer-to-peer or point-to-point, one-to-many, many-to-many, etc. data packet communication between the devices 104- 110.
  • data exchanged, for example, between devices 104 and 110 may utilize any available path or paths between the devices.
  • a single path through the switch fabric 130 may carry all of the data packets representing a communication between the device 104 and the device 110, or several communication paths may carry portions of the data packets. Subsequent communications may use the same paths or other paths as dictated by the then state of the network 102.
  • This flexibility provides reliability and speed advantages over bus architectures that are restricted to single communication paths between devices, and hence are subject to failure with failure of the single path or delays based upon congestion of the path.
  • communications between other of the devices 104-110 may occur simultaneously using the communication paths within the switch fabric 130.
  • the network 102 is a packet data network which may comply with a transmission control protocol/Internet (TCP/IP), asynchronous transfer mode (ATM), Infiniband, RapidlO, or any other packet data protocol now known or later developed. It may also include bus structures that are operated in a packet transit mode, as will be described herein later. As such, the network 102 may use data packets, having fixed or variable length, defined by one or more applicable protocols. For example, if the network 102 uses asynchronous transfer mode (ATM) communication protocol, an ATM standard data cell may be used.
  • ATM asynchronous transfer mode
  • the devices 104-110 need not be discrete devices.
  • the devices may be systems or subsystems of the vehicle and may include one or more legacy communication media, i.e., legacy bus architectures such as J1850, CAN, LIN, Flexray, MOST or similar bus structures.
  • legacy bus architectures such as J1850, CAN, LIN, Flexray, MOST or similar bus structures.
  • the respective interface 112-118 may be configured as a proxy or gateway to permit communication between the active network 102 and the legacy device 104-110.
  • the network 100 and those described in the afore-mentioned United
  • FIGs. 2 and 3 illustrate integration of a feature into a shared-access bus architecture.
  • the feature integrated is an interface designed to manage and control the presentation of information to the user.
  • the interface may be a three button interface such as shown in commonly assigned United States Patent Application Serial No. 10/458,295, the disclosure of which is hereby expressly incorporated herein by reference, although the application of the structure shown in FIGs. 2 and 3 is not so limited.
  • FIG. 2 illustrates the existing vehicle modules 202, 204 and 206 and their corresponding shared-access bus links 208, 210 and 212.
  • the vehicle also includes a diagnostic connector 213, used to physically connect the links 208-212 as will be described.
  • the added interface 200 includes a sensor fusion module 214 to which are coupled: a three-button interface device 216 via a serial link 218, a sensor 220 via an analog link 222, and a data logger/analyzer 224 via a CAN link 226 and a cellular telephone 228 via serial link 230.
  • the sensor fusion module 214 is further hardwire coupled to presentation devices via a hardwire link 232.
  • the shared-access bus is segmented to isolate on separate bus segments, segments 208-212 of FIG. 2. A physical connection to these bus segments is provided via the diagnostic connector 213, but certainly other physical arrangements may be made.
  • a switch fabric is architected and inserted into the vehicle to connect the bus segments 202-206, and hence the modules 202-206 to the interface 200.
  • the switch fabric 300 illustrated in FIG. 3 includes three nodes 302, 304 and 306, which in this exemplary embodiment are 9S12DP256 microcontroller devices which have a J1850 network interface, plural CAN modules, plural serial ports, resident memory and a 16 bit processor unit, although other types of network elements may be used.
  • the bus segments 202-206 are thus coupled via the corresponding J1850 link segments 208-212 to respective ones of the nodes 302-306 (physically via the diagnostic connector 213).
  • the nodes 302-306 are coupled to form the switch fabric via a plurality of CAN links 308-312.
  • the input/output ports of the node 302 couple to the lamp drivers and switch interfaces (not depicted) of the presentation devices and the sensor 218, the serial interfaces of the node 302 couple to the interface 216 and the cellular telephone 222, and the data logger/analyzer 220 is coupled via a remaining CAN module of the node 302 (not depicted) to arrive at that functional arrangement illustrated in FIG. 2.
  • Flow of bus messages from the modules 202-206 are now managed by the switch fabric 300 and the functionality of the installed interface 200. Having been separated from the shared-access bus structure, the existing modules 202-206 no longer receive every message communicated on the shared- access medium, i.e., listen and receive all messages, or send messages according to the transmit protocol.
  • the switch fabric 300 for this exemplary embodiment was structured from relatively sophisticated microcontroller devices. It will be appreciated that the switch fabric 300 may be formed from devices having less or more capability depending on the application. For example, the switch fabric may incorporate a single intelligent node, e.g., node 302 with the remaining nodes, e.g., nodes 304 and 306 being relatively simple flow control devices.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

Cette invention concerne une structure de réseau de véhicule comprenant un bus d'accès partagé interrompu et une matrice de commutation intégrée dans celle-ci au niveau du point d'interruption. La matrice de commutation permet d'incorporer un élément ou un dispositif dans la structure à bus d'accès partagé sans modifier ou revoir le protocole de bus d'accès partagé ou les dispositifs existants.
PCT/US2005/013438 2004-05-10 2005-04-19 Reseau de vehicule a bus d'acces partage interrompu WO2005114434A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/842,684 2004-05-10
US10/842,684 US20050251608A1 (en) 2004-05-10 2004-05-10 Vehicle network with interrupted shared access bus

Publications (1)

Publication Number Publication Date
WO2005114434A1 true WO2005114434A1 (fr) 2005-12-01

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WO (1) WO2005114434A1 (fr)

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US7623552B2 (en) * 2004-10-14 2009-11-24 Temic Automotive Of North America, Inc. System and method for time synchronizing nodes in an automotive network using input capture
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